MEGAN DIMINICH MCWILLIAMS PA
NPI 1326418781
Physician Assistant in New York, NY

Active since September 29, 2015PECOS Enrolled
489 5TH AVE FL 3, NEW YORK, NY 10017(888) 663-6331(415) 252-7176 Get Directions Write a Review

NPPES record last updated: February 6, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Feb 6, 2026, Jan 26, 2026, Nov 21, 2023 and 1 more (4 updates tracked since 2015).

About Megan Diminich Mcwilliams Pa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MEGAN DIMINICH MCWILLIAMS PA (NPI 1326418781) is an individual physician assistant in New York, New York, licensed in New York (033094) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and maintains a secondary practice location in Charleston.

NPPES Registry Identity

NPI1326418781
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMEGAN DIMINICH MCWILLIAMSCredential: PA
Location Address489 5TH AVE FL 3New York, NY 10017-6145
Mailing Address1 Embarcadero Ctr Ste 1900San Francisco, CA 94111-3723 · (888) 663-6331
Fax(415) 252-7176
Sole ProprietorNo
Enumeration DateSeptember 29, 2015
Last NPPES UpdateFebruary 6, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 6, 2026
NPI 1326418781 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Licenses Licensed in NY · 033094 Licensed in SC · 2428
Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

489 5TH AVE FL 3, New York, NY 10017

Other Names 1

Former Name (1)Abigail Megan Diminich Pa

Secondary Practice Location 1

Location 121 Burns LnCharleston, SC 29401-1492 · Phone (843) 779-8570

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Megan Diminich Mcwilliams Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$81.44 typical visit price
range $21.20 – $160.66
Typical copayment $20.36 (range $5.30 – $40.16)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Practitioner
489 5TH AVE FL 3
NEW YORK, NY 10017
Nurse Practitioner (Family)
489 5TH AVE FL 3
NEW YORK, NY 10017
Physician Assistant
489 5TH AVE FL 3
NEW YORK, NY 10017
Physician Assistant
489 5TH AVE FL 3
NEW YORK, NY 10017
Physician Assistant
489 5TH AVE FL 3
NEW YORK, NY 10017
Nurse Practitioner (Community Health)
489 5TH AVE FL 3
NEW YORK, NY 10017
Nurse Practitioner
489 5TH AVE FL 3
NEW YORK, NY 10017
Nurse Practitioner (Family)
489 5TH AVE FL 3
NEW YORK, NY 10017

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Megan Mcwilliams's NPI number?

The NPI number for Megan Mcwilliams is 1326418781. It was assigned to this individual provider in the NPPES registry on September 29, 2015. The provider is also known as Abigail Megan Diminich PA.

Where is Megan Mcwilliams located?

Megan Mcwilliams practices at 489 5th Ave Fl 3, New York, NY 10017. The listed phone number is (888) 663-6331.

What is Megan Mcwilliams's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Megan Mcwilliams enrolled in Medicare?

Yes. Megan Mcwilliams is registered in the Medicare PECOS enrollment system.

What insurance does Megan Mcwilliams accept?

Health plans from First Choice Next and Molina Healthcare list Megan Mcwilliams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Megan Mcwilliams was last updated on February 6, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.